Browse Prior Art Database

Stiffened Card With Integrated Circuit

IP.com Disclosure Number: IPCOM000060407D
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Double, GP: AUTHOR

Abstract

This article describes a card carrying an integrated circuit element in which the card includes a pair of metal planar elements which stiffen the card and provide heat dissipation and electromagnetic shielding for the integrated circuit. Fig. 1 shows a perspective view of a card and Fig. 2 shows an enlarged, cross-sectional view of a portion of the card of Fig. 1, taken looking along the line II-II, looking in the direction of the arrows. As shown in the figures, a card 10 is preferably in the conventional shape and size of a credit card. Carried within the card is an integrated circuit element 12 which may be electrically interconnected to one or more other integrated circuit elements (not shown) and/or to electrical contacts 14 for coupling to a card reader or other external electrical device.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 2

Stiffened Card With Integrated Circuit

This article describes a card carrying an integrated circuit element in which the card includes a pair of metal planar elements which stiffen the card and provide heat dissipation and electromagnetic shielding for the integrated circuit. Fig. 1 shows a perspective view of a card and Fig. 2 shows an enlarged, cross- sectional view of a portion of the card of Fig. 1, taken looking along the line II-II, looking in the direction of the arrows. As shown in the figures, a card 10 is preferably in the conventional shape and size of a credit card. Carried within the card is an integrated circuit element 12 which may be electrically interconnected to one or more other integrated circuit elements (not shown) and/or to electrical contacts 14 for coupling to a card reader or other external electrical device. The card includes upper and lower plastic covers 16, 18 defining the top and bottom of the card, which may include printed information, or a magnetic stripe or some combination thereof, as desired. Inwardly of the plastic covers are metal sheets 20, 22 which extend over the integrated circuit element 12. This metal sheet is preferably made of beryllium-copper, while a high tensile strength stainless steel or mu metal sheet is believed to be a suitable substitute. Advantageously, each of the metal sheets 20, 22 is approximately 5 mils thick. The integrated circuit 12 is immediately adjacent, and possibly has a portion of its cover in contact with one of the metal sheets 20, 22 to turn the entire card into a radiator of heat generated by the chips. The integrated circuit 12 is connected to wires or to a polyimide-like interconnect layer 24, providing desired interconnection paths between the integrated circuit and the contacts and/or other integrated circuits. Advantageously, the two metal sheets are maintained at a uniform displacemen...